Dean blows a shifter

Dean and Sam were walking through a dark hallway, the light above them flicked a few times. "Dean you sure this is the right place?" asked Sam
"Yes Sam I am sure" he said back
"OK" said Sam as he backed off
Then the light went off and Dean and Sam yelled but something had took Dean and then it came back for Sam.

"Where the hell am I?" said Sam as he opened his eyes to find he was strapped to a chair, he looked up and  there he saw Dean in a shirt and tie sucking off a... Shifter? How could Sam tell because the face was changing again and again. Then Sam yelled at Dean but the shifter was shoving that cock in Dean mouth harder and faster than before. Dean felt the cock rumble inside of his mouth but could not do anything as his hands were tied behind his back. Just then Dean bit the shifters dick and the shifter pulled it out from his mouth, Dean turned to Sam and went to talk but...He felt something hot explode on his face ...and liked it, It was cum and now dean wanted more but the shifter was empty so he turned to Sam... 

My first story tell me what you think if you like it there will be a second part.